Heater



May 14, 1935. c. 'r. CARLSON HEATER Filed Oct. 17, 1932 ar A!!! ATTORNEYS.

.w l m Patented May 14, 1935 IF'UNITEDQSTATES PATENT OFFICE HEATER CarlT. Carlson, Erie, Pa., assignor to Eric City Iron Works, Erie, Pa., acorporation of Pennsylvania Application October 17, 1932, Serial No.638,191

3 Claims.

The present invention is designed to simplify and-render more efficientheating devices. The invention is exemplified as an air heater utilizingas a medium for heating the air, for instance, flue gases. The air soheated may be utilized for combustion. In fabricating the heater Iprovide tubes for carrying one of the heat exchanging fluids and arrangethese tubes so that the heater as a whole can expand without strain andthe tubes can be introduced with very small effort. I also provide meansso that any tube, or tube plate, may be readily removed, or renewedwhere either of these are injured, Fea-- tures and details of theinvention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawing as follows:-

Fig. 1 shows a front elevation of the heater, one of the plates beingpartially removed to better show construction.

Fig'. 2 a section on the line 2-2 in Fig. 1.

Fig. 3 a section on the line 3-3 in Fig. 1.

Fig. 4 a plan view of an upper tube plate detached.

Fig. 5 a plan view of a lower tube plate detached.

Fig. 6 an enlarged view on the line 22 in Fig. 1.

Fig. 7 a section on the line |1 in Fig. 4.

Fig. 8 a section on the line 88 in Fig. 5.

Fig. 9 a section on the line 99 in Fig. 6 of one of the upper tubeplates, the tubes being omitted.

Fig. 10 a section on the line I 0l0 in Fig. 6 of one of the lower tubeplates, the tubes being omitted.

l marks the case which is ordinarily rectangular and has an inletopening 2 for air at one upper face and a discharge opening 3 for air atthe lower part of the opposite face so that the air has an incoming,downward and outgoing movement. Brackets 4 are arranged transverselyalong the inner Walls of the case. Upper tube plates 5 are secured onthe upper brackets 44, these tube plates having tube openings arrangedin pairs and the tube plates being arranged on an incline. Lower tubeplates 6 are mounted on the lower brackets 4. These tube plates alsohave tube openings arranged in pairs and registering with the tubeopenings in the plates 5. The plates 5 and 6 have attaching extensions Iand these extensions rest on the brackets 4 and are secured thereon bybolts 1a.

Openings 8 in the lower tube plate have tube sockets 9 formed in theirupper ends, the sockets faces and. by biting into the metal on the slopeof the seat form a substantially gas-tight joint-.-

The tubes II extend through openings l2 in the upper plate and the upperparts of these openings have enlargements l3 in which is putincombustible packing I3a, such for instance, as asbestos. It will benoted that the sockets with their seats ID are formed in steppedrelation down the inclined bottom plate and it will be noted that thesockets, I3, in the upper plate are similarly stepped. The hot gases aredelivered to a chamber l4 below the bottom plate by an inlet flue l5 anda chamber I6 is arranged above the upper plate and discharges to a fluel1. It will be noted that with this structure the joint on the lowerseat is maintained largely by the weight of the tube, that the tubes maybe very readily inserted and removed, and that the packing in the uppersocket is such as to permit the sliding movement of the tube through thepacking so that the expansion and contraction to which the device issubjected will not injure the parts. The plates are preferably made innarrow sections, each plate being sufiiciently wide to carry a pair oftubes side by side.

It will be understood thatthe cover plate for the chamber 56 isremovable permitting the removal and replacement of any of the tubes, orthe removal of all the tubes with relation to any of the tube plates.This permits of the removal and replacement of the tube plates from theheat exchange chamber through manipulation from without the chamber andafter any tube plates are replaced the tubes may be renewed as abovedescribed. It will also be noted that the packing l3a may be removed byentrance to the chamber It only so that it is not necessary to enter theheat exchange space for this purpose. It will also be noted that nomachining is necessary in the apparatus, the sharp edge seating at thebottom making a sufficiently close joint for the bottom ends of thetubes and the gaskets affording a sufficiently close joint for the upperends of the tubes. This permits of the use of comparatively light, orinexpensive tubing, in fact, inexpensive materials for the entiredevice.

While I haveshown the sections carrying the tubes as having a widthincluding two rows of tubes, it will be understood that these sectionsare not limited to this number of rows of tubes. By making the sections,however, of a convenient 7 width; or containing a convenient number oftubes, the installation and handling of the sections is very much moreconvenient than larger sections. By webbing the individual sections ofthe supports their weight may be very much reduced, thus facilitatingthe handling and erection of the apparatus. It will be understood thatordinarily the top and bottom plates will be installed'in positionand'the tubes 3 inserted in the assembled apparatus; the top plate abovethe chamber l6 being preferably removable to facilitate this assembly.It will be noted also that the openings 8 leading to the tubes haverounded corners, or are flaring toward the inlet. This maybe readilyaccomplished because these inlets are formed in the supports. rangementof opening reduces the resistance to flow very materially.

What I claim as new is:-

1. In a heater, the combination of acase having an inlet and discharge;a tube plate at the bottom of the case having openings with beveledtubeseats therein; a tube plateat the top with openings therein; tubesextending into the openings in the top plate and, said tubes havingsurrounding edges at their bottom ends seated on Such an arthe beveledsurfaces 01 the seats in the bottom plate; and inlet and exhaustchambers outside of the tube plates with which the tubes communicate.

2. In a heater, the combination of a case having an inlet and discharge;a series of tube plates at the bottom arranged side by side and ininclined position, said tube plates having openings therein'with tubeseats in the openings; an inclined top plate at the'top with tubeopenings therein; tubes extending into the openings in the top plate andseated on the seats in the bottom plates; and inlet and exhaust chambersoutside the tube plates with which the tubes connect.

3. In a heater, the combination of a case having an inlet and discharge;a tube plate at the bottom of the case having openings with tube'seats'thereimthe inlet sides of said openings be-

